Insulator-support.



O. P. MEGAHAN.

INSULATOR SUPPORT.

APPLICATION FILED JULY 18, 1911.

1,029,207, Patented June 11, 1912.

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UNITED sT 'rEs PATENT OFFICE.

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The present invention relates'to improvements in insulator supports.

The object of the invention is the provision of a cross arm having wiresupporting devices of novel'formwhich are efficient and durableand willprevent falling of the wire should a break occur; to provide a rigid andcompact joint between the cross arm and pole; and generally to improvethe construction of devices of this character as will be hereinafter setforth.

The invention consists in certain novel features of construction andcombinations and arrangements of parts as illustrated in thedrawings andmore particularly pointed out in the claim.

The accompanying drawings illustrateone' completeexample of theembodiment of the invention, and a modification thereof, constructedaccordin hflVBSO far devised or the practical appli-- to the best mode Ication of the principles; 4 V

. Figure 1 is an elevation of the top of a pole with the cross arm'attached thereto. Fig. 2 isaside elevation of Fig. 1. Fig. 3 is a viewof a single hanging pin. Fig. 4 is a view ofadouble hanging pin. Fig. 5

is a view of a single top pin. Fig. 6 is a partial side elevation of thecross arm showing form of hanging pin with modified at- Fig. 7 is a sideviewrof Fig. 6. Fig. 8 is an enlarged sectional view of the cross armshowing reinforcing construct-ion and perforation for insulator pins,Fig. 9 is a sectionahview of the cross arm with metallic thimble orsocket for the insulator pin. Fig. 10 isa side elevation of poleshowingstay rods and manner of securing the arm to the pole and spaceleft for adjustment.

The pole l-may be of wood or concrete construction and is providedwitlrai'ecess or socket 2 for the reception of an edge portion of thecross arm 3. -The cross arm is Specification if Letters Patent.

Application filed July 18, 1911. Befial 1T0. 839,128.

PatentedJune11',1j912.

composed-0f concrete reinforced with longitudinal bars 4 and connectingwires or bars 5, and is preferably A-shape in cross section for securingstrength combined with lightness in weight. The cross arm is secured tothe pole by.means of astrap bent, as in Figs. 2 and 10, to conform tothe shape of the cross arm and secured by bolts 7 and 8 to the pole. Apair of metallic stays or brace bars 9 are bolted at 10 to the pole andthe free end of each bar is twisted and perforated as at 11 forattachment to the under side of the crossarm.

In 1 two forms of insulator pins are illustrated, as means for securingthe brace bars to the cross arm. The single han pin 12 is provided witha U-shaped bend 13' upon which the insulator 14 is supported.

The threaded end 15 of the rod with the lower nut 16 thereon is passedthrough the perforated end 11 of the stay arm 9 and the opening 17 inthe cross arm, and the bar is clamped in position by the upper nut 18.The double hanging pin 19 is identical with the single pin .12, but hasa longer threaded end upon which may he placed'an upper insulator 14'.In some instances the hanger pin may be formed with a hook 20, as shownin Figs. 6 and 7. In this case the hook is perforated and the usual-bolt21 is passed therethrough, through the cross arm and also through theperforated end 11 of the stay bar 9. It will be understood that the bolt21, (Fig. 5) may also he used to support an insulator, as at the rightendof Fig. 1. A further modification is illustrated in Fig. 9 whereinthe cross arm has embedded therein a metallic socket 22 for thereception of the insulator pin which may he wood or metal, and to drainof? moistnre, the lower end of the metallic thimble socket is perforatedat 23 which alines with the perforation 2 E of the cross arm. Undercertain conditions, wood strips, indicated at 25 (Fig. 8) may be laid ontop of the cross arm and under the pins, as a-non-conductor or wearplate for the wire which might become loose and drop onto the arm. Andwood lined hangers 26 (Fig. 6) may also he used for the same pose on thelower insulator pins.

Having thus fully described inveir purtion, what I claim as new anddesire to se- I bolt passed through said hook and arm and cure byLetters Patent is: having a second insulator thereon." 10

The combination with a cross arm of a In testimony whereof I aflix mysignature support formed with an upwardly bent in presence of'twoWitnesses.

=' lower hooked end having an insulator there- OLIVER P. MEGAHAN.

on, a flat perforated upper end shaped with Witnesses: a downwardly benthook engaging the arm KATHARINE VINCENT, and suspended thereover, and afastening C. M. SHIGLEY.

